|Número de publicación||US7910816 B2|
|Tipo de publicación||Concesión|
|Número de solicitud||US 12/432,561|
|Fecha de publicación||22 Mar 2011|
|Fecha de presentación||29 Abr 2009|
|Fecha de prioridad||1 May 2008|
|También publicado como||US20090272249|
|Número de publicación||12432561, 432561, US 7910816 B2, US 7910816B2, US-B2-7910816, US7910816 B2, US7910816B2|
|Inventores||Stan C. Glowacki|
|Cesionario original||Glowacki Stan C|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (39), Otras citas (2), Citada por (13), Clasificaciones (8), Eventos legales (1)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
This application claims priority of U.S. provisional application Ser. No. 61/049,505 filed on May 1, 2008 having the same title as the present application.
1. Field of the Invention
This invention relates generally to percussion instruments for musical use and more particularly to a percussive instrument having a case with a circular or connected curve interior surface and multiple high precision balls carried within the case for persistent sound generation.
2. Related Art
A number of percussive instruments are available for pulsed or shaken sound such as maracas or shakers. U.S. Pat. No. 7,045,695 issued on May 16, 2006 to Cohen describes an exemplary instrument of this type. While having the potential for sound generation based on shaking or pulsing of the instrument resulting in multiple percussive impact of beads carried within the instrument, no potential for persistent sound is available. So called “rain sticks” allow a flow of beads through an orifice in a resonant tube to create a flowing or persistent sound, however the nature of the sound is not easily controllable for musical use.
It is therefore desirable to provide a percussive instrument which has the capability for providing pulsed beats as with a maraca but also allows generation of sound with natural persistence. It is also desirable that the instrument be capable of varied sound quality in the persistent sound generation mode.
The present invention provides a percussion instrument having a case with an inner surface having a substantially circular profile. One or multiple high precision spherical balls are contained with the case for acceleration on the inner surface in uniform circular motion along the profile to produce a persistent sustained sound. In one exemplary embodiment the case is cylindrical and incorporates two end plates. In a second embodiment the percussion instrument case is torroidal. In a third embodiment the percussion instrument is spherical. Use of varying materials in the case or differing surface textures on the inner surface allows timbre of the instrument to be modified. Motion of the instrument lateral or perpendicular to the circular profile allows the creation of pulsed percussion sounds.
A single instrument may be created by interconnection of multiple individual cases having differing numbers of balls or differing materials of construction.
These and other features and advantages of the present invention will be better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
Referring to the drawings,
Alternatively, and most indicative of the present invention, the instrument is accelerated substantially tangentially to the circumference of the cylinder and uniform spherical motion of the balls, represented by arrows 17, is induced along the interior wall. This motion of the balls provides a very low resistance and a persistent sound is generated by multiple orbitals of the balls on the interior surface; producing a “swooshing”, “whirring”, “whizzing” or “buzzing” sound. The high precision spherical shaping of the balls allows the persistence of the sound to continue for an extended period. The sound may be terminated by imparting a lateral acceleration to lift the balls from the surface or by tilting the cylinder to spiral the balls to an end plate. As will be described in greater detail subsequently, alternative materials in the end plates or other distinct sections within the differing embodiments may be employed to alter the sound, mute the sound, or capture the balls to terminate the sound.
The two forms of sound generation are easily mixed by the percussionist by holding the cylinder in the hand using a lateral shaking for pulsed percussion and a flick of the wrist to induce the uniform circular motion. The embodiments of the instrument shown in the drawings comprise the basic case only. The case can also be mounted on a fixed or removable handle in alternative embodiments to increase the moment arm for inducing higher accelerations to the balls contained in the instrument both for the pulsed percussion created by moving the balls within the inner volume between surfaces and the uniform circular motion with the balls in contact with the inner surface for the persistent or sustained sound.
In alternative embodiments, the length of the cylinder my be less than its diameter to create a disc shaped instrument similar to a tambourine or lengthened to create a can shape providing greater interior surface on the wall and greater distance between end plates. The radius of the case of the instrument is sufficient for the uniform circular motion of the balls to be induced. The radius will range from a minimum of one inch to sizes up to and above 18 inches, depending on the shape of the embodiment and the size of the interior balls. The size of the balls in relation to the size of the embodiment is chosen to effect the timbre, the velocities, and the sustain of the instrument.
A second embodiment of the invention is shown in
A third embodiment is shown in
The embodiments of the instrument described may be fabricated from plastic, metal, mineral, various woods or frame supported diaphragms to create sounds with various timbre for both the shaken pulsed percussive sound and the persistent uniform circular motion sound. Varying combinations of material forms in the cylinder and end plates allows further tailoring of the desired sounds. As exemplary, the end plates of the cylindrical embodiment of
In addition to material types, the finish or texture of the inner surface 18 affects the timbre of the persistent sound. As shown in
With a multiple textured inner surface, the percussionist may create uniform circular motion on one portion or the other or with light lateral acceleration create a transition from one surface to the other by the rotating balls resulting in a change in timbre during the sustain.
An enhanced embodiment of the invention is shown in
Additionally, surface features transverse to the circumferential direction of the inner surface are employed in alternative embodiments for altering timbre of the generated persistent sustain. Ridges 44 such as that shown in
Multiple chambers may be incorporated in a single instrument to provide varying combined sounds from differing materials, ball diameters or other effects.
Alternative shapes of the overall instrument are employed in various embodiments such as bowl 11 or cup 13 shapes with one end plate 12 or various ellipsoids terminating in end plates or with curved terminations. Exemplary shapes for the instrument are shown in
Additional complexity of sound may be created by interconnecting multiple separate instruments of the embodiments disclosed for simultaneous actuation.
Having now described the invention in detail as required by the patent statutes, those skilled in the art will recognize modifications and substitutions to the specific embodiments disclosed herein. Such modifications are within the scope and intent of the present invention as defined in the following claims.
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|1||*||Coffee Can Drum, © 1996-2008, viewed Jul. 16, 2010 at http://www.rhythmweb.com/homemade/coffeecan.htm. Drum includes circumferential rings and may have beads inside at the maker's choice.|
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|Clasificación de EE.UU.||84/410, 446/419, 84/411.00R, 84/406|
|Clasificación internacional||A63H5/00, G10D13/08|